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Disable codegen prepare critical edge splitting. Machine instruction passes now

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break critical edges on demand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114633 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-09-23 06:55:34 +00:00
parent 108c872466
commit dd3a41a6b3
11 changed files with 28 additions and 25 deletions
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6
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -31,6 +31,7 @@
#include "llvm/Transforms/Utils/BuildLibCalls.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/Support/CallSite.h"
#include "llvm/Support/CommandLine.h"
@ -42,10 +43,12 @@
using namespace llvm;
using namespace llvm::PatternMatch;
STATISTIC(NumElim, "Number of blocks eliminated");
static cl::opt<bool>
CriticalEdgeSplit("cgp-critical-edge-splitting",
cl::desc("Split critical edges during codegen prepare"),
cl::init(true), cl::Hidden);
cl::init(false), cl::Hidden);
namespace {
class CodeGenPrepare : public FunctionPass {
@ -302,6 +305,7 @@ void CodeGenPrepare::EliminateMostlyEmptyBlock(BasicBlock *BB) {
PFI->removeEdge(ProfileInfo::getEdge(BB, DestBB));
}
BB->eraseFromParent();
++NumElim;
DEBUG(dbgs() << "AFTER:\n" << *DestBB << "\n\n\n");
}

6
test/CodeGen/ARM/lsr-on-unrolled-loops.ll
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@ -624,12 +624,12 @@ bb23: ; preds = %bb22, %bb20, %bb9,
bb24: ; preds = %bb23
; LSR should use count-down iteration to avoid requiring the trip count
; in a register, and it shouldn't require any reloads here.
; in a register.
; CHECK: @ %bb24
; CHECK-NEXT: @ in Loop: Header=BB1_1 Depth=1
; CHECK-NEXT: sub{{.*}} [[REGISTER:(r[0-9]+)|(lr)]], #1
; CHECK-NEXT: bne.w
; CHECK: subs [[REGISTER:(r[0-9]+)|(lr)]], #1
; CHECK: bne.w
%92 = icmp eq i32 %tmp81, %indvar78 ; <i1> [#uses=1]
%indvar.next79 = add i32 %indvar78, 1 ; <i32> [#uses=1]

2
test/CodeGen/Thumb/2010-07-15-debugOrdering.ll
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@ -10,7 +10,7 @@
define void @_Z19getClosestDiagonal3ii(%0* noalias sret, i32, i32) nounwind {
; CHECK: blx ___muldf3
; CHECK: blx ___muldf3
; CHECK: beq LBB0_8
; CHECK: beq LBB0_7
; CHECK: blx ___muldf3
; <label>:3
switch i32 %1, label %4 [

2
test/CodeGen/X86/2008-02-18-TailMergingBug.ll
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@ -1,4 +1,4 @@
; RUN: llc < %s -march=x86 -mcpu=yonah -stats |& grep {Number of block tails merged} | grep 9
; RUN: llc < %s -march=x86 -mcpu=yonah -stats |& grep {Number of block tails merged} | grep 16
; PR1909
@.str = internal constant [48 x i8] c"transformed bounds: (%.2f, %.2f), (%.2f, %.2f)\0A\00" ; <[48 x i8]*> [#uses=1]

5
test/CodeGen/X86/lsr-reuse.ll
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@ -389,7 +389,7 @@ return:
; rdar://7657764
; CHECK: asd:
; CHECK: BB9_5:
; CHECK: BB9_4:
; CHECK-NEXT: addl (%r{{[^,]*}},%rdi,4), %e
; CHECK-NEXT: incq %rdi
; CHECK-NEXT: cmpq %rdi, %r{{[^,]*}}
@ -464,7 +464,7 @@ bb5: ; preds = %bb3, %entry
; And the one at %bb68, where we want to be sure to use superhero mode:
; CHECK: BB10_9:
; CHECK: BB10_7:
; CHECK-NEXT: movaps 48(%r{{[^,]*}}), %xmm{{.*}}
; CHECK-NEXT: mulps %xmm{{.*}}, %xmm{{.*}}
; CHECK-NEXT: movaps 32(%r{{[^,]*}}), %xmm{{.*}}
@ -484,7 +484,6 @@ bb5: ; preds = %bb3, %entry
; CHECK-NEXT: addq $64, %r{{.*}}
; CHECK-NEXT: addq $64, %r{{.*}}
; CHECK-NEXT: addq $-16, %r{{.*}}
; CHECK-NEXT: BB10_10:
; CHECK-NEXT: cmpq $15, %r{{.*}}
; CHECK-NEXT: jg

2
test/CodeGen/X86/phi-immediate-factoring.ll
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@ -1,5 +1,5 @@
; RUN: llc < %s -march=x86 -stats |& grep {Number of blocks eliminated} | grep 6
; PR1296
; RUN: llc < %s -march=x86 | grep {movl \$1} | count 1
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
target triple = "i686-apple-darwin8"

2
test/CodeGen/X86/phys_subreg_coalesce-2.ll
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@ -1,4 +1,4 @@
; RUN: llc < %s -march=x86 | grep mov | count 5
; RUN: llc < %s -march=x86 | grep mov | count 4
; PR2659
define i32 @binomial(i32 %n, i32 %k) nounwind {

2
test/CodeGen/X86/postra-licm.ll
View File

@ -68,7 +68,7 @@ bb26.preheader: ; preds = %imix_test.exit
bb23: ; preds = %imix_test.exit
unreachable
; X86-32: %bb26.preheader.bb28_crit_edge
; X86-32: %bb26.preheader
; X86-32: movl -16(%ebp),
; X86-32-NEXT: .align 4
; X86-32-NEXT: %bb28

7
test/CodeGen/X86/pr2659.ll
View File

@ -1,4 +1,4 @@
; RUN: llc < %s -march=x86 -mtriple=i686-apple-darwin9.4.0 | grep movl | count 5
; RUN: llc < %s -march=x86 -mtriple=i686-apple-darwin9.4.0 | grep movl | count 4
; RUN: llc < %s -march=x86 -mtriple=i686-apple-darwin9.4.0 | FileCheck %s
; PR2659
@ -14,10 +14,11 @@ forcond.preheader: ; preds = %entry
%cmp44 = icmp eq i32 %k, 0 ; <i1> [#uses=1]
br i1 %cmp44, label %afterfor, label %forbody
; CHECK: %forcond.preheader.forbody_crit_edge
; CHECK: %forcond.preheader
; CHECK: movl $1
; CHECK-NOT: xorl
; CHECK-NEXT: movl
; CHECK-NOT: movl
; CHECK-NEXT: je
ifthen: ; preds = %entry
ret i32 0

15
test/CodeGen/X86/tail-opts.ll
View File

@ -153,19 +153,16 @@ bb30:
; an unconditional jump to complete a two-way conditional branch.
; CHECK: c_expand_expr_stmt:
; CHECK: jmp .LBB3_7
; CHECK-NEXT: .LBB3_12:
; CHECK: jmp .LBB3_11
; CHECK-NEXT: .LBB3_9:
; CHECK-NEXT: movq 8(%rax), %rax
; CHECK-NEXT: xorb %dl, %dl
; CHECK-NEXT: movb 16(%rax), %al
; CHECK-NEXT: cmpb $16, %al
; CHECK-NEXT: je .LBB3_6
; CHECK-NEXT: je .LBB3_11
; CHECK-NEXT: cmpb $23, %al
; CHECK-NEXT: je .LBB3_6
; CHECK-NEXT: jmp .LBB3_15
; CHECK-NEXT: .LBB3_14:
; CHECK-NEXT: cmpb $23, %bl
; CHECK-NEXT: jne .LBB3_15
; CHECK-NEXT: .LBB3_15:
; CHECK-NEXT: jne .LBB3_14
; CHECK-NEXT: .LBB3_11:
%0 = type { %struct.rtx_def* }
%struct.lang_decl = type opaque

4
test/CodeGen/X86/tailcallfp2.ll
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@ -1,8 +1,9 @@
; RUN: llc < %s -march=x86 -tailcallopt | grep {jmp} | grep {\\*%edx}
; RUN: llc < %s -march=x86 -tailcallopt | FileCheck %s
declare i32 @putchar(i32)
define fastcc i32 @checktail(i32 %x, i32* %f, i32 %g) nounwind {
; CHECK: checktail:
%tmp1 = icmp sgt i32 %x, 0
br i1 %tmp1, label %if-then, label %if-else
@ -10,6 +11,7 @@ if-then:
%fun_ptr = bitcast i32* %f to i32(i32, i32*, i32)*
%arg1 = add i32 %x, -1
call i32 @putchar(i32 90)
; CHECK: jmpl *%e{{.*}}
%res = tail call fastcc i32 %fun_ptr( i32 %arg1, i32 * %f, i32 %g)
ret i32 %res